End-wrench



W. S, WEBBER.

END WRENCH.

APPLICATION FILED OCT. 28, I920.

Patnted Sept. 13, 1921.

UNITED STATES":

WILLIAM s. WEBBER, OF CHICAGO, ILLINOIS.

END-WRENCH.

Application filed October 28, 1920. Serial No. 420,202.

To all whom it may concern Be it known that I, WILLIAM S. WEBBER, acitizen of the United States, residing at Chicago, in the county of Cookand State of Illinois, have invented certain new and useful Improvementsin End -'Wrenches of which the following is a specification,referencebeing had to the accompanying drawings, and to the referencecharacters marked thereon, which form a part of this specification.

This invention relates to improvements in end wrenches. I

When one desires to manipulate a nut or a bolt, it frequently, happensthat the parts are so firmly secured together by friction or rust as tomake it necessary to use two wrenches-one applied to the head of thebolt I and the other to the nut. It also frequently happens that itisvery awkward for the operator to hold one wrench on the bolt head, whilemanipulating the nut with the other wrench, as for instance, where thebolt head is underneath a projecting part, as in an automobile, or anyother situation where it is desirable for the operator to have one freehand to use.

To overcome these andother difficulties,

I I have provided an end wrench with a construction whereby when thejaws of the wrench are passed about the two opposite and parallel sidesof a bolt head, the wrench will be locked or. cramped in position andwill be self-supporting; that is,l will not'require the operators handto ho d it in posi- .tion.

. The accomplishment of this object and in 7 order to provide a cheap,simple and effective end wrench, are the principal objects of myinvention; the furtheradvanta es of which will become more apparent asproceed with my specification.

In the form of the invention which I have chosen to illustrate in theaccompanying i drawings, Figure 1 is a side view of a double 7 g j I ithe shank 1' by meansof a locking linkilG. This link 16 is composed of awire piece bent headed wrench, one end of which is provided with myimprovement.

Fig. 2 is a similar view showing the lockin device released.

Fig. 3 is a transverse,,vertical, sectionalstance provided with two'endwrenches, B

Fig. 7 is'a side View of the wrench prjovided with two differentmodifications of the improvements shown in F igs; 1 and2. v

Figs. 8, 9, 10, 11 and'l2 are vertical transverse sectional views ofthe'wrench shown in Fig. 7 the same being taken in the planes of thedotted'lines 8+8, 9'9, 10-10, 11%"1-1, and 1212 respectively. 1

'Referring' now to the wrench as shown in Figs. 1 to 6, inclusive,-IArepresents the end wrench as a whole, the same beingcomposed of'a shankor handlemember 1, in this in- C. Each wrenchB, C, is provided with apair of jaws, 2, 3, which jaws are formed by recessing the end of thewrench and providing parallel si'de'faces 4, '5, joined a third face 6,at their innerendsi The jaw 2 of the head B is centrally splitorsl'otted,

as indicated at.7, and in this slot or space is positioned the lockingmember'S of a lever 9. The lever 9 is pivotally attached; to the headBby means of the bolt or pin 10. The lever 9 is'made of a relativelythinand narrow bar, bent at ll'so that its major width will stand in a yinglongitudinally within the concave under surface of the handleof'thislever 9 is a spring 12, its forward end being bent'downwardly to form aprong 13 fitting in a suitable and vertically disposed aperture in'theshank or handle 1, as indicated in Figs 2 and 4. The normal position ofthe spring 12 will be as indicated in Fig.2; that is .to say, the

plane at right angles to or across the slot 7.

jplortion of the wrench shank. or handle 1.

rear end 14 will press the outer or free end pressed position of the.lever S) as indicated in F ig, 1, itsrear endl5' isheld down uponbetween its ends so that the two ends 17 enter suitable recesses 18 inthe shank 1 of the wrench. In the upper edge of the shank 1 of thewrench is a longitudinally arranged groove 19 (see Fig. 6, and asindicated by the dotted line in Fig. 2).

. of the lever 9 upwardly, rotating said leverj" .upon the pivotpi'n orbolt 10. In the comrecess 19. When the side walls 4, 50f the jaws 2, 3,encompass a bolt head or nut and. it is desirous of locking the wrenchto said bolt head or nut, the locking link 16 is slipped ofi from theend of the lever 9. The lever 9 is then, under the influence of thespring 12, actuated about its fulcrum or pivot 10 and the face of its"forward end brought into the recess. The face 20,

shank 1 and bear against the lever 28. The v wire ends 29 are bentinwardly and enter' thus extending beyond the wall 4:, is crampedagainst the face of the nut or bolt head. The wrench and the nut or bolthead are thus locked together by thev tension of the spring 12 whichexerts a friction hold greater than the dead Weight of the wrench. Theoperator may thenrelease his hands from the wrench and proceed with anyother manipulation of the machinery. If the formation of the lever slot7 have "any tendency toweaken the wrench end B, or particularly the jaw2 thereof, this may be overcome by making one part of the end B thickerthan the other part. This is indicated by the raised up lugs 22, 22,shown clearly in Figs. 1, 2 and 3.

The end C of the wrench is made toac-- commodate-a nut or bolt head of adifierent size from the end B- 'The end C may be made precisely as theend B and similarly provided with a lever 9 and spring 12, alv thoughthis construction is not shown, as Ia matter of convenience in drafting.

In the modification shown in Figs. 7 to 12, both ends B and C are shownas provided with spring actuated locking levers and with looking linksfor holding the levers in position. The lever indicated at 23 differsfromthe lever 9 in that it is relatively fiat and narrow, and notconcavo convex in cross section, and rests upon the free end of a flator leaf spring 24. This spring 2i. may be secured in a recess on theshank 1 ofthe wrench. Said wrench is rounded at its upper end 25 anddiffers from the shank illustrated in Fig. 1 in that it is not providedwith the recess 19.

The other modification shown in Fig. 7 and in Figs. 9-12 inclusive,embraces a wire bent between its ends so that its transverse bentportion 27 will be beneath the suitable recess in the shank 1 near thehead B. This wire is U-shaped and its two side 7 jaws at one end members30 extend one on each side of the shank 1 of the wrench. Each sidemember 80 passes through a wire loop 31 secured in the shank 1, as moreclearly indicated in Fig. 7 and 10.

Various modifications and changes may be made in the details ofconstruction, the principle of the invention being observed when an openend wrench is provided with a recessed jaw in' wh'ich the short arm of apivoted 0r fulcrumed lever is positioned and which jlev er is springactuated.

I claim as my invention:

1. Theimprovement mend-wrenches comprising a shank member of generallyoval form in cross section having a groove in its margin extendinglongitudinally of the shankand having a pair of nut engaging of theshank, one of said jaws being slotted, a. pivoted lever fulcrume'd insail slotted jaw, the handle end ofthe lever extending over the grooved.margin of the shank land being concaved' in cross section to formagroove complementa'l to the shank groove, a resilient member positionedin the grooves between said lever and shank, secured at one end to thelatterand adapted to operate the lever, and means for locking the leveragainst movement.

2. An improved'end-wrench comprising a shank or handle member, a pair ofjaws the inside faces of which "constitute "parallel walls adapted to"engage the opposite sides of a nut or bolt head, one'of said jaws beingslotted, a pivoted lever fulcrumed in the slotted j aw,one end of saidlever being pro vided with an engaging surface adapted to be moved intothe space between said jaws,

the other end of said lever constituting a handle portion extendinglongitudinally of the shank member of the wrench, means associated-withsaid handle portion and the shank for actuating the handle portion away"fromsa'id shank and a movable lock on the shank adapted to engage thelever.

In testimony that I claim the-foregoing as my invention 1 aiiix mysignature, in the presence of two witnesses, this 25th day of October,1920; a I

WILLIAM s. WEBBER.

WVitnesses:

' TAYLOR BROWN,

B. L. MACGREGOR,

